I would say hardwoods due to percussion but I gotta tell ya I made a custom (shaped to my r hand) wrap around grip for a SistemaColt 1927 about 6 yrs. ago and it turned out beautiful, wish I had pictures. It was all done with SPF scrap. I had worried about it's durability because it wasn't a hardwood but it turned out fine. Put a 1000 rds through it with nary a shift. I textured it by taking a fine file and crisscrossing it. Then I stained and polyurathaned it. It had the wrap around feel of a revolver. I've been thinkin of taking the rubber grips off my Rossi 351 and doing the same thing. I will use hardwood this time though. Not only for durability but the beauty of the hardwoods, like walnut. I saw one of your revolvers, if I recall correctly, in the gallery here that I was quite impressed with. It reminded me of this Sistema that I had done. Keep us posted if this is what u r going to attempt, Bonedigger. Or should I call u Fred ;D ;D